7" Custom Fish Oil Rig . This hand Made Custom piece combines the high functionality of a precision glass dab rig with a heady glass fish design to stunning effect. Luckily, you don’t have to go scouring the ocean floor for this aquatic treasure. A built-in percolator lends to silky smooth clouds and premium diffusion. The contours of this wax rig, crafted from high quality borosilicate, lend to a comfortable yet secure grip. This oil rig comes with an included 14mm glass nail and pointed glass dabbing tool.